Depending on the processed material from each drill must be properly sharpened. To verify the correct angle will help a specially prepared square plate of copper or aluminium with a thickness of 1 mm.
To become operational protractor enough to cut it cut, as shown in the picture: a large cutout at an angle of 120 degrees, the other half is 60 degrees and the surviving corner of a square is 90.
Recommend to read
CREATIVE CORNER
I was always surprised how passionate people are literally "cuts out" even in their small apartments place under house workshop while compactly arranging the equipments and tools...
WINGED HYDROPLANE
Speed radioact with a sail-wing. Competitions of radio controlled model yachts are one of the most exciting. Silent glide of sailboats on the smooth surface of the pond, clearly they can...
